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30 December, 10:55

In cats, black fur is dominant over brown fur. If two heterozygous cats have a litter of three kittens, what is the probability that all three kittens will be brown?

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  1. 30 December, 11:36
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    1/4 or 25% probability of 3 brown kittens.

    Explanation:

    Black fur is dominant = B

    Brown fur is recessive = b

    Heterozygous cats = Bb

    Cross between two heterozygous cats

    Bb x Bb

    The result of that genotype will be BB, Bb, Bb, bb

    BB = 1/4 or 25%

    Bb (2) = 2/4 or 50%

    bb = 1/4 or 25%

    So, brown fur (bb) has 25% chance in three kittens.
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